(19)
(11) EP 0 507 746 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.05.1993 Bulletin 1993/21

(43) Date of publication A2:
07.10.1992 Bulletin 1992/41

(21) Application number: 92830145.6

(22) Date of filing: 25.03.1992
(51) International Patent Classification (IPC)5: G01N 15/02
(84) Designated Contracting States:
DE ES FR GB

(30) Priority: 03.04.1991 IT FI910076

(71) Applicant: ISTITUTO NAZIONALE DI OTTICA
I-50125 Arcetri Firenze (IT)

(72) Inventors:
  • Longobardi, Giuseppe
    I-50125 Firenze (IT)
  • Francini, Franco
    I-50124 Firenze (IT)
  • Castellini, Carlo
    I-50144 Firenze (IT)

(74) Representative: Mannucci, Gianfranco, Dott.-Ing. et al
Ufficio Tecnico Ing. A. Mannucci Via della Scala 4
I-50123 Firenze
I-50123 Firenze (IT)


(56) References cited: : 
   
       


    (54) Method and device for measuring the particle size distribution of a flowing solid particulate substance


    (57) The device for measuring the particle size distribution by means of image analysis comprises a source of illumination (1), a means (3) of capturing the image of the particles contained in the specimen to be measured, projected by said light source onto said means of capture, and means of processing the signals captured by said means of capture; the source of illumination (1) is a pulsed source and a measuring chamber (5) with means to permit a continuous flow of the specimen is disposed between the source of illumination (1) and the means of capture (3).






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